Wind power generation device and wind power generation control method thereof

Abstract

The invention discloses a wind power generation device and a wind power generation control method.The wind power generation device comprises a supporting column, a sensor and a wind power generation mechanism, the wind power generation mechanism comprises a generator and a fan blade set, the wind power generation device further comprises a speed reduction mechanism, the speed reduction mechanism is electrically connected with a control system, and the sensor is electrically connected with the control system; when the sensor detects that the external wind speed reaches the first preset value, the control system controls the speed reduction mechanism to blow air to the fan blade set, speed reduction is conducted through blowing, a braking speed reduction structure does not need to be additionally installed between the blades and the generator, and therefore mechanical abrasion and maintenance cost are reduced; a complicated mechanical braking speed reduction structure is not arranged, so that the design of the wind driven generator is simpler, the weight is lighter, and the installation and the maintenance are more convenient; and mechanical parts are reduced, so that the reliability of the whole system is improved, potential fault points are reduced, and the service life of the wind driven generator is prolonged.

Description

Technical Field

[0001] This invention relates to the field of wind power generation equipment technology, to a wind power generation device, and to a wind power generation control method for the wind power generation device. Background Technology

[0002] With the increasing global demand for clean energy and rising environmental awareness, wind power has received widespread attention and development as an important renewable energy source. A wind power system typically consists of one or more wind turbines that convert wind energy into electrical energy. It captures wind energy through blades and converts it into mechanical energy, which is then converted into electrical energy by a generator.

[0003] Changes in wind speed have a direct impact on the operating efficiency and safety of wind power generation systems. At low wind speeds, the output power of wind power generation systems is relatively low; while at high wind speeds, it may cause overload of the wind power generation mechanism, or even damage to key components such as the wind turbine blades and generator.

[0004] Existing wind power systems typically employ mechanical braking or blade angle adjustment to mitigate overload risks at high wind speeds. While these methods can protect wind turbines from damage to some extent, they have several shortcomings in practical applications: First, mechanical braking may lead to additional energy loss, and frequent use increases maintenance costs; second, adjusting blade angle requires precise control technology and may not respond promptly under extreme wind speeds.

[0005] This invention is based on the above circumstances. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and provides a wind power generation device that can decelerate the generator shaft by blowing air onto the wind turbine assembly under high wind speed conditions.

[0007] This invention is achieved through the following technical solution:

[0008] A wind power generation device includes a support column, a sensor for detecting the magnitude of the external wind speed, and a wind power generation mechanism connected to the support column. The wind power generation mechanism includes a generator and a wind blade assembly connected to the generator shaft. The wind power generation device also includes a speed reduction mechanism that blows air onto the wind blade assembly to reduce its rotational speed. The speed reduction mechanism is electrically connected to a control system that controls it to start blowing air. The sensor is electrically connected to the control system. When the sensor detects that the external wind speed reaches a first preset value, the control system controls the speed reduction mechanism to blow air onto the wind blade assembly.

[0009] As described above, the wind power generation device further includes an air compressor and a gas storage tank for storing the gas discharged from the air compressor. The speed reduction mechanism includes a first exhaust pipe connected to the gas storage tank and capable of discharging gas to the wind blade assembly. The first exhaust pipe is provided with a first control valve assembly for controlling its on / off state.

[0010] As described above, the wind power generation device further includes an acceleration mechanism that blows air onto the wind turbine assembly to increase the rotational speed of the wind turbine assembly. The acceleration mechanism includes a second exhaust pipe connected to a gas storage tank and capable of discharging gas to the wind turbine assembly. The second exhaust pipe and the first exhaust pipe are respectively connected to different output terminals of a first control valve assembly.

[0011] As described above, in a wind power generation device, the blade assembly includes a first blade and a second blade. A rotating frame for connecting the first blade to the generator shaft is provided between the first blade and the generator shaft. The second blade is located inside the first blade and is arc-shaped. When the first exhaust pipe exhausts, it blows towards the concave side of the second blade, and when the second exhaust pipe exhausts, it blows towards the convex side of the second blade.

[0012] As described above, the wind power generation device further includes a timed solenoid valve connected in parallel with the gas storage tank, and the air inlet end of the first control valve group is connected to the output end of the timed solenoid valve.

[0013] As described above, in a wind power generation device, a plurality of second wind blades are connected to the generator shaft, the number of first exhaust pipes is equal to the number of second exhaust pipes, the number of second exhaust pipes is equal to the number of second wind blades, the first control valve group includes a two-way control valve, the gas storage tank is connected to the air inlet of the two-way control valve, and the first exhaust pipe and the second exhaust pipe are respectively connected to the two output ends of the two-way control valve.

[0014] In the wind power generation device described above, a booster compressor is provided between the air compressor and the air storage tank, which can compress the air from the air compressor more tightly and store it in the air storage tank.

[0015] As described above, a wind power generation device is provided with a protective net on the outside of the wind power generation mechanism to prevent flying organisms from colliding with the wind power generation mechanism, and the protective net is provided with protrusions to prevent birds from standing on the protective net.

[0016] In one wind power generation device as described above, the surface of one or more of the first blades is coated with dark pigment.

[0017] In the wind power generation device described above, an electrical control cabinet is provided at the bottom of the support column, and the air compressor, booster and air storage tank are all located inside the electrical control cabinet.

[0018] This invention overcomes the shortcomings of the prior art and provides a wind power generation control method for a wind power generation device.

[0019] This invention is achieved through the following technical solution:

[0020] A wind power generation control method for the above-mentioned wind power generation device.

[0021] The control system is electrically connected to the air compressor and the first control valve group and controls the operation of the air compressor and the first control valve group;

[0022] S1. The control system controls the air compressor to compress and store air in the air tank. When there is no wind or the sensor detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group to connect the air tank and the second exhaust pipe. The second exhaust pipe discharges the gas to the second fan blade, thereby increasing the rotational speed of the generator shaft. When the sensor detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group to connect the air tank and the first exhaust pipe. The first exhaust pipe discharges the gas to the second fan blade, thereby reducing the rotational speed of the generator shaft.

[0023] A wind power generation control method for a wind power generation device as described above:

[0024] S2. A booster compressor is provided between the air compressor and the air tank to compress the air from the air compressor more tightly and store it in the air tank. The control system controls the air compressor to compress the air through the booster compressor and store it in the air tank. When the sensor detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group to connect the air tank and the second exhaust pipe. The second exhaust pipe discharges the gas to the second fan blade, thereby increasing the rotational speed of the generator shaft. When the sensor detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group to connect the air tank and the first exhaust pipe. The first exhaust pipe discharges the gas to the second fan blade, thereby reducing the rotational speed of the generator shaft.

[0025] A wind power generation control method for a wind power generation device as described above:

[0026] S3. The wind power generation device also includes a timed solenoid valve connected in parallel with the gas storage tank. The air inlet end of the first control valve group is connected to the output end of the timed solenoid valve. The control system presets a time period through the timed solenoid valve. During the preset time period, the timed solenoid valve directly connects the air compressor to the first control valve group. When the sensor detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group to connect the air compressor to the second exhaust pipe. The air compressor discharges gas to the second wind blade through the second exhaust pipe, thereby increasing the rotational speed of the generator shaft.

[0027] Within a preset time period, when the sensor detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group to connect the air compressor and the first exhaust pipe. The air compressor discharges gas to the second fan blade through the first exhaust pipe, thereby reducing the rotational speed of the generator shaft.

[0028] During non-preset time periods, the timed solenoid valve blocks the connection between the air compressor and the first control valve group, and the timed solenoid valve connects the air tank and the first control valve group. When the sensor detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group to connect the air tank and the second exhaust pipe. The air tank discharges gas to the second fan blade through the second exhaust pipe, thereby increasing the rotational speed of the generator shaft.

[0029] Within a preset time period, when the sensor detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group to connect the gas storage tank and the first exhaust pipe. The gas storage tank then discharges gas to the second fan blade through the first exhaust pipe, thereby reducing the rotational speed of the generator shaft.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. The wind power generation device also includes a speed reduction mechanism that blows air onto the wind turbine blades when the sensor detects that the outside wind speed has reached a first preset value, thereby reducing the speed of the wind turbine blades and thus the speed of the generator shaft. Compared with speed reduction through mechanical structures, deceleration by blowing air does not require an additional braking speed reduction structure between the blades and the generator, thus reducing mechanical wear and maintenance costs. Mechanical braking speed reduction structures exacerbate energy loss, while deceleration by blowing air can reduce this energy loss, thereby improving overall efficiency. The absence of a complex mechanical braking speed reduction structure makes the design of the wind turbine simpler, lighter, and easier to install and maintain. Due to the reduction of mechanical parts, the reliability of the entire system is improved, potential failure points are reduced, and the service life of the wind turbine is extended.

[0032] 2. The wind power generation device also includes an acceleration mechanism that blows air onto the wind turbine assembly to increase the rotation speed of the generator shaft when the sensor detects that the outside wind speed is lower than the second preset value. When the outside wind speed is low, compressed air stored in the air tank can be released to blow air onto the wind turbine assembly, thereby helping the wind turbine assembly to rotate continuously, and thus enabling the wind power generation device to generate electricity continuously.

[0033] 3. A booster compressor is installed between the air compressor and the air tank, which can store more gas into the air tank.

[0034] 4. A protective net is installed on the outside of the wind power generation mechanism. The protective net can prevent flying organisms from colliding with the wind power generation mechanism, thereby protecting the wind power generation mechanism.

[0035] 5. The protective net is equipped with protrusions to prevent birds from standing on it. These protrusions increase the difficulty for birds to stand on the net and reduce the risk of wind turbines being corroded by bird droppings.

[0036] 6. Applying dark paint to the surface of one or more first blades can serve as a warning to birds or aircraft.

[0037] 7. The wind power generation device also includes a timed solenoid valve connected in parallel with the gas storage tank. The air inlet end of the first control valve group is connected to the output end of the timed solenoid valve. The timed solenoid valve presets a time period. During the preset time period, the low-pressure gas tank of the air compressor can supply supplementary air to the first exhaust pipe and the second exhaust pipe at any time. However, during non-preset time periods, the gas in the high-pressure gas storage tank is opened to supply the generator shaft for deceleration and acceleration. Attached Figure Description

[0038] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0039] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0040] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0041] Figure 3 yes Figure 2 Enlarged view of section A in the middle;

[0042] Figure 4 yes Figure 2 Enlarged view of section B;

[0043] Figure 5 This is a schematic diagram of the structure in this invention in which a timed solenoid valve is connected in parallel between the air compressor and the air tank;

[0044] Figure 6 This is a schematic diagram showing the distribution of the first exhaust pipe and the second exhaust pipe in this invention;

[0045] Figure 7 This is a schematic diagram illustrating the acceleration mechanism in this invention that helps increase the rotational speed of the fan blade assembly;

[0046] Figure 8 This is a schematic diagram illustrating the reduction of the fan blade assembly speed by the speed reduction mechanism in this invention;

[0047] Figure 9 This is a schematic diagram showing the connection between the first exhaust pipe, the second exhaust pipe, and the first control valve group in this invention.

[0048] Figure 10This is a schematic diagram of the structure in this invention where the second fan blade is connected to the generator shaft;

[0049] Figure 11 This is a schematic diagram of the structure of the present invention in which three sets of second fan blades are connected to the generator shaft. Detailed Implementation

[0050] The present invention will now be further described with reference to the accompanying drawings:

[0051] like Figures 1 to 11 The wind power generation device shown includes a support column 1, a sensor 2 for detecting the magnitude of the external wind speed, and a wind power generation mechanism 3 connected to the support column 1. The wind power generation mechanism 3 includes a generator 31 and a wind blade assembly connected to the shaft of the generator 31. The wind power generation device also includes a speed reduction mechanism that blows air onto the wind blade assembly to reduce its rotational speed. The speed reduction mechanism is electrically connected to a control system that controls its air blowing operation. The sensor 2 is electrically connected to the control system. When the sensor 2 detects that the external wind speed reaches a first preset value, the control system controls the speed reduction mechanism to blow air onto the wind blade assembly. The wind power generation mechanism 3 can be a vertical axis wind power generation mechanism, which can rotate in the same direction regardless of wind direction changes; other wind power generation mechanisms are also possible. The sensor 2 can be a wind speed sensor.

[0052] Compared to deceleration via mechanical structures, deceleration via airflow eliminates the need for an additional braking and deceleration structure between the blades and the generator 31, thus reducing mechanical wear and maintenance costs. Mechanical braking and deceleration structures exacerbate energy loss, while deceleration via airflow reduces this energy loss, thereby improving overall efficiency. The absence of complex mechanical braking and deceleration structures simplifies the design of wind power generation devices, making them lighter and easier to install and maintain. The reduction in mechanical components improves the reliability of the entire system, reduces potential failure points, and extends the service life of the wind power generation device.

[0053] Specifically, the wind power generation device further includes an air compressor 7 and an air storage tank 71 for storing the gas discharged by the air compressor 7. The speed reduction mechanism includes a first exhaust pipe 41 connected to the air storage tank 71 and capable of discharging gas to the wind blade assembly. The first exhaust pipe 41 is provided with a first control valve assembly 42 for controlling its on / off state.

[0054] Furthermore, the wind power generation device also includes a timed solenoid valve 70 connected in parallel with the gas storage tank 71, and the air inlet end of the first control valve group 42 is connected to the output end of the timed solenoid valve 70. The timer solenoid valve 70 presets a time period. During this preset time period, the timer solenoid valve 70 directly connects the air compressor 7 to the first control valve group 42. When the sensor 2 detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group 42 to connect the air compressor 7 to the first exhaust pipe 41. The air compressor 7 then discharges gas to the second fan blade 62 through the first exhaust pipe 41, thereby reducing the rotational speed of the generator 31 shaft. During non-preset time periods, the timer solenoid valve 70 blocks the connection between the air compressor 7 and the first control valve group 42. The timer solenoid valve 70 connects the air tank 71 to the first control valve group 42. When the sensor 2 detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group 42 to connect the air tank 71 to the first exhaust pipe 41. The air tank 71 then discharges gas to the second fan blade 62 through the first exhaust pipe 41, thereby reducing the rotational speed of the generator 31 shaft.

[0055] Of course, the wind power generation device in this case can also be equipped with both a mechanical speed reduction structure and the wind speed reduction mechanism in this case, so as to prevent the failure of the mechanical speed reduction structure through the wind speed reduction mechanism in this case.

[0056] Furthermore, the wind power generation device also includes an acceleration mechanism that can blow air onto the wind turbine assembly to increase the rotational speed of the generator 31 shaft when the sensor 2 detects that the outside wind speed is lower than a second preset value. The acceleration mechanism includes a second exhaust pipe 51 connected to the air storage tank 71 and capable of discharging gas to the wind turbine assembly. The second exhaust pipe 51 and the first exhaust pipe 41 are both connected to the first control valve group 42, and the first control valve group 42 controls the opening and closing of the second exhaust pipe 51 and the first exhaust pipe 41 respectively.

[0057] During a preset time period, the timer solenoid valve 70 directly connects the air compressor 7 to the first control valve group 42. When the sensor 2 detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group 42 to connect the air compressor 7 to the second exhaust pipe 51. The air compressor 7 then discharges gas to the second fan blade 62 through the second exhaust pipe 51, thereby increasing the rotational speed of the generator 31 shaft. During non-preset time periods, the timer solenoid valve 70 blocks the connection between the air compressor 7 and the first control valve group 42. The timer solenoid valve 70 connects the air tank 71 to the first control valve group 42. When the sensor 2 detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group 42 to connect the air tank 71 to the second exhaust pipe 51. The air tank 71 then discharges gas to the second fan blade 62 through the second exhaust pipe 51, thereby increasing the rotational speed of the generator 31 shaft.

[0058] In some embodiments, the fan blade assembly includes a first fan blade 61 and a second fan blade 62. A rotating frame 63 for connecting the first fan blade 61 to the generator 31 shaft is provided between the first fan blade 61 and the generator 31 shaft. The second fan blade 62 is located inside the first fan blade 61 and is arc-shaped. When the first exhaust pipe 41 exhausts, it blows towards the concave side of the second fan blade 62, and when the second exhaust pipe 51 exhausts, it blows towards the convex side of the second fan blade 62.

[0059] In some embodiments, a booster compressor 72 is provided between the air compressor 7 and the air tank 71 to compress the air from the air compressor 7 more tightly and store it in the air tank 71. This allows a single air storage unit to be used for a longer period of time, thereby reducing the number of air storage operations.

[0060] In some embodiments, a plurality of second fan blades 62 are connected to the shaft of the generator 31. The number of first exhaust pipes 41 is equal to the number of second exhaust pipes 51, and the number of second exhaust pipes 51 is equal to the number of second fan blades 62. The first control valve group 42 includes a multi-way diverter valve disposed on the output end of the air storage tank 71 and a two-way control valve connected to the output end of the multi-way diverter valve. The air storage tank 71 is connected to the air inlet end of the multi-way diverter valve, and the first exhaust pipe 41 and the second exhaust pipe 51 are respectively connected to the two output ends of the two-way control valve.

[0061] In one embodiment, there are three of each of the first exhaust pipe 41, the second exhaust pipe 51, and the second fan blade 62, with the second fan blade 62 evenly distributed circumferentially on the rotating shaft of the generator 31.

[0062] In one embodiment, multiple sets of second fan blades 62 are connected axially along the shaft of the generator 31. Each first exhaust pipe 41 has an air outlet corresponding to the position of each set of second fan blades 62, and each second exhaust pipe 51 has an air outlet corresponding to the position of each set of second fan blades 62. This prevents the second fan blades 62 from being too long in the vertical direction and deforming due to prolonged blowing on one position. One, two, or more sets of second fan blades 62 can be connected axially along the shaft of the generator 31.

[0063] In one embodiment, the generator 31 is a wind turbine that can generate electricity by blowing the second blade 62 with a light breeze.

[0064] In some embodiments, the support column 1 has a cavity 10 inside for power supply lines and pipe wiring. The top of the support column 1 has a mounting base 100 for mounting the wind power generation mechanism 3. The first exhaust pipe 41 and the second exhaust pipe 51 can be fixedly connected to the mounting base 100 via flanges or other connecting structures. A protective net 8 is fitted around the outside of the wind power generation mechanism 3 to limit the impact of flying organisms on it. The protective net 8 is connected to the mounting base 100 via threaded fasteners or other connecting structures. The protective net 8 limits the impact of flying organisms on the wind power generation mechanism 3, thereby protecting it. The protective net 8 has protrusions 81 for preventing birds from standing on it. The ends of the protrusions 81 are tapered, making it difficult for birds to stand / perch on the protective net, reducing the impact of bird droppings on the wind power generation mechanism.

[0065] In some embodiments, the sensor 2 is mounted on the side of the protective net 8.

[0066] In some embodiments, the surface of one or more of the first fan blades 61 is coated with a dark pigment, such as black or yellow, which serves as a warning to birds or aircraft. Compared to installing warning lights, coating with pigment does not require power to maintain and avoids the potential for flashing warning lights to disturb residents.

[0067] In some embodiments, an electrical control cabinet 9 is provided at the bottom of the support column 1, and the air compressor 7, booster 72, and air storage tank 71 are all located inside the electrical control cabinet 9. The electrical control cabinet 9 also contains a battery for storing the electrical energy generated by the wind power generation mechanism 3. The electrical control cabinet 9 is also equipped with lifting lugs 91 for easy hoisting of the wind power generation device.

[0068] A wind power generation control method for a wind power generation device:

[0069] S1. The control system controls the air compressor 7 to compress and store air in the air tank 71. When there is no wind outside or the sensor 2 detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group 42 to connect the air tank 71 with the second exhaust pipe 51. The second exhaust pipe 51 discharges gas to the second fan blade 62, thereby increasing the rotational speed of the generator 31 shaft. When the sensor 2 detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group 42 to connect the air tank 71 with the first exhaust pipe 41. The first exhaust pipe 41 discharges gas to the second fan blade 62, thereby reducing the rotational speed of the generator 31 shaft.

[0070] S2. A booster compressor 72 is provided between the air compressor 7 and the air storage tank 71, which enables the air storage tank 71 to store more gas. The control system controls the air compressor 7 to compress air through the booster compressor 72 and store it in the air storage tank 71. When the sensor 2 detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group 42 to connect the air storage tank 71 and the second exhaust pipe 51. The second exhaust pipe 51 discharges gas to the second fan blade 62, thereby increasing the rotational speed of the generator 31 shaft. When the sensor 2 detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group 42 to connect the air storage tank 71 and the first exhaust pipe 41. The first exhaust pipe 41 discharges gas to the second fan blade 62, thereby reducing the rotational speed of the generator 31 shaft.

[0071] S3. The wind power generation device also includes a timed solenoid valve 70 connected in parallel with the gas storage tank 71. The air inlet end of the first control valve group 42 is connected to the output end of the timed solenoid valve 70. The control system presets a time period through the timed solenoid valve 70. During the preset time period, the timed solenoid valve 70 directly connects the air compressor 7 to the first control valve group 42. When the sensor 2 detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group 42 to connect the air compressor 7 to the second exhaust pipe 51. The air compressor 7 discharges gas to the second wind blade 62 through the second exhaust pipe 51, thereby increasing the rotational speed of the generator 31 shaft.

[0072] Within a preset time period, when sensor 2 detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group 42 to connect the air compressor 7 and the first exhaust pipe 41. The air compressor 7 discharges gas to the second fan blade 62 through the first exhaust pipe 41, thereby reducing the rotational speed of the generator 31 shaft.

[0073] During non-preset time periods, the timer solenoid valve 70 blocks the connection between the air compressor 7 and the first control valve group 42, and the timer solenoid valve 70 connects the air storage tank 71 to the first control valve group 42. When the sensor 2 detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group 42 to connect the air storage tank 71 to the second exhaust pipe 51. The air storage tank 71 discharges gas to the second fan blade 62 through the second exhaust pipe 51, thereby increasing the rotational speed of the generator 31 shaft.

[0074] Within a preset time period, when sensor 2 detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group 42 to connect the gas storage tank 71 with the first exhaust pipe 41. The gas storage tank 71 discharges gas to the second fan blade 62 through the first exhaust pipe 41, thereby reducing the rotational speed of the generator 31 shaft.

[0075] The preset time periods in S4 and S3 are from 07:00 to 22:30 every day. During the preset time period, the low-pressure air tank of air compressor 7 can supply air to the first exhaust pipe 41 and the second exhaust pipe 51 at any time. However, during the environmentally friendly quiet time from 22:30 to 07:00 the next morning, if air compressor 7 starts operating, it will generate noise that will affect the rest of residents. Therefore, it is necessary to time the solenoid valve 70 to open the gas in the high-pressure air tank 71 during this quiet time period to supply the generator 31 shaft for deceleration and acceleration.

Claims

1. A wind power generation device, characterized in that: The device includes a support column (1), a sensor (2) for detecting the magnitude of the external wind speed, and a wind power generation mechanism (3) connected to the support column (1). The wind power generation mechanism (3) includes a generator (31) and a wind blade assembly connected to the shaft of the generator (31). The wind power generation device also includes a speed reduction mechanism that can blow air onto the wind blade assembly to reduce the rotation speed of the wind blade assembly. The speed reduction mechanism is electrically connected to a control system that can control it to start blowing air. The sensor (2) is electrically connected to the control system. When the sensor (2) detects that the external wind speed reaches a first preset value, the control system controls the speed reduction mechanism to blow air onto the wind blade assembly.

2. The wind power generation device according to claim 1, characterized in that: The wind power generation device also includes an air compressor (7) and an air storage tank (71) for storing the gas discharged by the air compressor (7). The speed reduction mechanism includes a first exhaust pipe (41) connected to the air storage tank (71) and capable of discharging gas to the wind blade assembly. The first exhaust pipe (41) is provided with a first control valve assembly (42) for controlling its on / off state.

3. A wind power generation device according to claim 2, characterized in that: The wind power generation device also includes an acceleration mechanism that can blow air into the wind turbine assembly to increase the rotation speed of the wind turbine assembly. The acceleration mechanism includes a second exhaust pipe (51) connected to the air storage tank (71) and capable of discharging gas to the wind turbine assembly. The second exhaust pipe (51) and the first exhaust pipe (41) are respectively connected to different output terminals of the first control valve assembly (42).

4. A wind power generation device according to claim 3, characterized in that: The fan blade assembly includes a first fan blade (61) and a second fan blade (62). A rotating frame (63) for connecting the first fan blade (61) to the generator (31) shaft is provided between the first fan blade (61) and the generator (31) shaft. The second fan blade (62) is located inside the first fan blade (61) and is arc-shaped. When the first exhaust pipe (41) exhausts, it blows towards the concave side of the second fan blade (62), and when the second exhaust pipe (51) exhausts, it blows towards the convex side of the second fan blade (62).

5. A wind power generation device according to claim 4, characterized in that: The wind power generation device also includes a timed solenoid valve (70) connected in parallel with the gas storage tank (71), and the air inlet of the first control valve group (42) is connected to the output of the timed solenoid valve (70).

6. A wind power generation device according to claim 5, characterized in that: The generator (31) shaft is connected to multiple second fan blades (62). The number of first exhaust pipes (41) is equal to the number of second exhaust pipes (51), and the number of second exhaust pipes (51) is equal to the number of second fan blades (62). The first control valve group (42) includes a two-way control valve. The air storage tank (71) is connected to the air inlet of the two-way control valve. The first exhaust pipe (41) and the second exhaust pipe (51) are respectively connected to the two output ends of the two-way control valve.

7. A wind power generation device according to claim 2, characterized in that: A booster (72) is provided between the air compressor (7) and the air tank (71) to compress the air from the air compressor (7) more tightly and store it in the air tank (71).

8. A wind power generation device according to any one of claims 1-7, characterized in that: The wind power generation mechanism (3) is fitted with a protective net (8) on its outer side to limit the impact of flying organisms on the wind power generation mechanism (3). The protective net (8) is provided with protrusions (81) to limit birds from standing on the protective net (8).

9. A wind power generation device according to any one of claims 1-7, characterized in that: The surface of one or more of the first blades (61) is coated with dark pigment.

10. A wind power generation device according to claim 7, characterized in that: The bottom of the support column (1) is provided with an electrical control cabinet (9), and the air compressor (7), booster (72) and air tank (71) are all located in the electrical control cabinet (9).

11. A wind power generation control method having the wind power generation device according to any one of claims 4-7, characterized in that: The control system is electrically connected to the air compressor (7) and the first control valve group (42) and controls the operation of the air compressor and the first control valve group (42); S1. The control system controls the air compressor (7) to compress and store air in the air tank (71). When there is no wind outside or the sensor (2) detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group (42) to connect the air tank (71) with the second exhaust pipe (51). The second exhaust pipe (51) discharges the gas to the second fan blade (62), thereby increasing the rotational speed of the generator (31) shaft. When the sensor (2) detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group (42) to connect the air tank (71) with the first exhaust pipe (41). The first exhaust pipe (41) discharges the gas to the second fan blade (62), thereby reducing the rotational speed of the generator (31) shaft.

12. The wind power generation control method for a wind power generation device according to claim 11, characterized in that: S2. A booster compressor (72) is provided between the air compressor (7) and the air storage tank (71) to compress the air from the air compressor (7) more tightly and store it in the air storage tank (71). The control system controls the air compressor (7) to compress the air through the booster compressor (72) and store it in the air storage tank (71). When the sensor (2) detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group (42) to connect the air storage tank (71) and the second exhaust pipe (51). The second exhaust pipe (51) discharges the gas to the second fan blade (62) to increase the rotation speed of the generator (31) shaft. When the sensor (2) detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group (42) to connect the air storage tank (71) and the first exhaust pipe (41). The first exhaust pipe (41) discharges the gas to the second fan blade (62) to reduce the rotation speed of the generator (31) shaft.

13. A wind power generation control method for a wind power generation device according to claim 11 or 12, characterized in that: S3. The wind power generation device also includes a timed solenoid valve (70) connected in parallel with the gas storage tank (71). The air inlet of the first control valve group (42) is connected to the output of the timed solenoid valve (70). The control system presets a time period through the timed solenoid valve (70). During the preset time period, the timed solenoid valve (70) directly connects the air compressor (7) to the first control valve group (42). When the sensor (2) detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group (42) to connect the air compressor (7) to the second exhaust pipe (51). The air compressor (7) discharges gas to the second wind blade (62) through the second exhaust pipe (51) to increase the rotational speed of the generator (31) shaft. Within a preset time period, when the sensor (2) detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group (42) to connect the air compressor (7) and the first exhaust pipe (41). The air compressor (7) discharges gas to the second fan blade (62) through the first exhaust pipe (41), thereby reducing the rotational speed of the generator (31) shaft. During non-preset time periods, the timed solenoid valve (70) blocks the connection between the air compressor (7) and the first control valve group (42), and the timed solenoid valve (70) connects the air tank (71) and the first control valve group (42). When the sensor (2) detects that the outside wind speed is lower than the second preset value, the control system controls the first control valve group (42) to connect the air tank (71) and the second exhaust pipe (51). The air tank (71) discharges gas to the second fan blade (62) through the second exhaust pipe (51), thereby increasing the rotational speed of the generator (31) shaft. Within a preset time period, when the sensor (2) detects that the outside wind speed reaches the first preset value, the control system controls the first control valve group (42) to connect the gas storage tank (71) with the first exhaust pipe (41). The gas storage tank (71) discharges gas to the second fan blade (62) through the first exhaust pipe (41), thereby reducing the rotational speed of the generator (31) shaft.

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